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Halogenation Strategy of Thiophene Derived Solvent Additives Enables Optimized Morphology for Organic Solar Cells with 19.17% Efficiency
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-01-14 , DOI: 10.1002/adfm.202313744
Wenyan Su 1 , Xuming Zhou 1 , Ze‐Fan Yao 2 , Hairui Bai 3 , Yuwei Duan 4 , Rui Sun 5 , Yue Wu 6 , Qiang Wu 3 , Hongmei Qin 1 , Chao Zhao 3 , Weiguo Zhu 7 , Han Young Woo 8 , Jie Min 5 , Yuxiang Li 1 , Wei Ma 3 , Qunping Fan 3
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-01-14 , DOI: 10.1002/adfm.202313744
Wenyan Su 1 , Xuming Zhou 1 , Ze‐Fan Yao 2 , Hairui Bai 3 , Yuwei Duan 4 , Rui Sun 5 , Yue Wu 6 , Qiang Wu 3 , Hongmei Qin 1 , Chao Zhao 3 , Weiguo Zhu 7 , Han Young Woo 8 , Jie Min 5 , Yuxiang Li 1 , Wei Ma 3 , Qunping Fan 3
Affiliation
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As simple and versatile tools, additives have been widely used to refine active layer morphology and have played a crucial role in boosting the power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, three novel solvent additives named Th-FSi, Th-ClSi, and Th-BrSi with the same backbone of 2,5-bis(trimethylsilyl)thiophene are designed and synthesized by substituting different halogens of fluorine, chlorine, and bromine, respectively. Notably, Th-ClSi exhibits the more significant dipole moment and engages in non-covalent interactions with a small-molecule acceptor (SMA) L8-BO, which slight adjustments in intermolecular interaction, crystallinity, and molecular packing in the PM6:L8-BO active layer. Consequently, the OSCs incorporating Th-ClSi outperform their Th-FSi and Th-BrSi counterparts in photo-capturing, reduced energy loss, superior exciton dissociation, and charge transfer properties, out-coming yields in an enhanced PCE of 18.29%. Moreover, by integrating a near-infrared absorbing SMA (BTP-eC9) guest into the PM6:L8-BO matrix, the absorption spectrum to span 880–930 nm, and the resultant ternary OSCs achieve a commendable PCE of 19.17%, ranking among the highest efficiencies reported to date is expanded. These findings underscore the promise of halogenated thiophene-based solvent additives as a potent avenue for morphological fine-tuning and consequent PCE enhancement in OSCs.
中文翻译：
噻吩衍生溶剂添加剂的卤化策略可优化有机太阳能电池的形态，效率达 19.17%
作为简单且多功能的工具，添加剂已被广泛用于细化活性层形态，并在提高有机太阳能电池（OSC）的功率转换效率（PCE）方面发挥着至关重要的作用。本文通过分别取代不同的氟、氯和溴卤素，设计并合成了三种具有相同主链2,5-双(三甲基硅基)噻吩的新型溶剂添加剂Th-FSi、Th-ClSi和Th-BrSi。 。值得注意的是，Th-ClSi 表现出更显着的偶极矩，并与小分子受体 (SMA) L8-BO 发生非共价相互作用，这对 PM6:L8-BO 中的分子间相互作用、结晶度和分子堆积进行了轻微调整活性层。因此，采用 Th-ClSi 的 OSC 在光捕获、减少能量损失、优异的激子解离和电荷转移性能方面优于 Th-FSi 和 Th-BrSi 同类产品，并且 PCE 提高了 18.29% 的产出产率。此外，通过将近红外吸收SMA（BTP-eC9）客体集成到PM6:L8-BO基质中，吸收光谱跨越880-930 nm，所得三元OSC实现了令人称赞的19.17%的PCE，位居前列。迄今为止报告的最高效率得到了扩展。这些发现强调了卤代噻吩基溶剂添加剂作为 OSC 形态微调和随后 PCE 增强的有效途径的前景。
更新日期：2024-01-14
中文翻译：
噻吩衍生溶剂添加剂的卤化策略可优化有机太阳能电池的形态，效率达 19.17%
作为简单且多功能的工具，添加剂已被广泛用于细化活性层形态，并在提高有机太阳能电池（OSC）的功率转换效率（PCE）方面发挥着至关重要的作用。本文通过分别取代不同的氟、氯和溴卤素，设计并合成了三种具有相同主链2,5-双(三甲基硅基)噻吩的新型溶剂添加剂Th-FSi、Th-ClSi和Th-BrSi。 。值得注意的是，Th-ClSi 表现出更显着的偶极矩，并与小分子受体 (SMA) L8-BO 发生非共价相互作用，这对 PM6:L8-BO 中的分子间相互作用、结晶度和分子堆积进行了轻微调整活性层。因此，采用 Th-ClSi 的 OSC 在光捕获、减少能量损失、优异的激子解离和电荷转移性能方面优于 Th-FSi 和 Th-BrSi 同类产品，并且 PCE 提高了 18.29% 的产出产率。此外，通过将近红外吸收SMA（BTP-eC9）客体集成到PM6:L8-BO基质中，吸收光谱跨越880-930 nm，所得三元OSC实现了令人称赞的19.17%的PCE，位居前列。迄今为止报告的最高效率得到了扩展。这些发现强调了卤代噻吩基溶剂添加剂作为 OSC 形态微调和随后 PCE 增强的有效途径的前景。
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